... scale integrated circuit ,a point to point ,link circuit ,loop optical transmission equipment . It can supply 4/8/16/24 interfaces ,one ... : 220VAC,-48VDC,+24VDC8.transmission distance : 2~120Km9.networking management function of SNMPTechnical parameters Optical fiber interface fiber typesingle mode fiber ,muti mode fiber ,optionalwave length1310nm,1550nm ...